Handlebar Grip

ABSTRACT

A handlebar grip ( 10 ) for a throttle twist grip ( 1 ) is arranged on a handlebar tube of a vehicle and is intended for actuating an actuator which determines the fuel supply for an internal combustion engine of the vehicle). The handlebar grip ( 10 ) has a spring engagement section ( 12 ) for engagement of a restoring spring ( 20 ). The spring engagement section ( 12 ) is formed in an outer region of the handlebar grip ( 10 ) in the longitudinal direction of the handlebar grip ( 10 ).

The invention relates to a handlebar grip according to theprecharacterizing clause of claim 1 and a throttle twist grip havingsuch a handlebar grip for vehicles with an internal combustion engine.

Throttle twist grips are disclosed, for example, in DE 30 13 008 A1. Inthe case of the throttle twist grips disclosed there, the handlebar gripis connected to a cable drum holding a Bowden cable. With the aid of theBowden cable, the actuator is actuated. For opening the throttle, thehandlebar grip is turned against the restoring force of the cable pull.If the throttle twist grip is released, the handlebar grip turns back toits starting position (idling position) owing to the restoring force.

DE 837 812 C discloses a bicycle twist grip having a slotted handlebargrip, in which the actuation of the bell, of the indicator or of thebrake is effected by brief turning of the twist grip back and forth. Atorsion spring having a corresponding pretension, which holds the twistgrip in its end position without vibration, is connected between thehandlebar grip and is connected between the handlebar grip and a conicalclamping device. In contrast, in the embodiments according to theinvention, the handlebar grip has an open outer end and the space forholding the restoring spring is closed on the outside by thecounterweight. According to the invention, the counterweight can beconnected integrally to the handlebar, welded thereto, fitted therein,adhesively bonded therein or connected otherwise to the handlebar tube.

AT 2069 U1 discloses a control device for speed control of an electricbicycle motor, in which the sensor and the recuperating spring arearranged in an internal region of the twist grip. In contrast to theembodiments according to the invention, the recuperating spring is inthe form of a pressure spring and not in the form of a torsion spring.

U.S. Pat. No. 5,893,295 discloses a hand grip having an apparatus forautomatic riding control, in which a ramp part with balls running on theramps is provided. The chosen fuel position is maintained owing to africtional force of the apparatus for automatic riding control. Onrotation of the hand grip against the throttle opening direction, thefrictional force is automatically eliminated.

WO 2005115824 A1 and JP 03-50 905 U each disclose hand grips in whichthe sensor is arranged inside the handlebar tube. In the embodiments ofthe invention, the sensor is on the other hand arranged outside thehandlebar tube. This has the advantage that no rod need be arranged inthe handlebar tube.

Throttle twist grips having handlebar grips in which the rotationalposition of the throttle twist grip is converted into an electric signalwhich is used for actuating an actuator which influences the fuelposition are also known. Such handlebar grips are disclosed in DE 100 27193 A1, the entire disclose content of which is to be incorporated byreference into the present disclosure. In particular, the technologydescribed there can be combined with the features of the presentinvention, with respect to how an electric control signal which is ameasure of the rotational position of the throttle twist grip can beobtained. Of course, other techniques known to the person skilled in theart can also be used in association with the present invention in orderto obtain an electric signal which is a measure of the position of thethrottle twist grip.

In the case of the known throttle twist grips in which the rotationalposition of the handlebar grip is converted into an electric signal, thethrottle twist grip is turned against the action of a restoring springin order to open the throttle, as disclosed in DE 100 27 193 A1. Therestoring spring is arranged on that side of the throttle twist gripwhich is close to the middle of the handlebars and, with one end,engages a spring engagement section of the handlebar grip which isarranged in a handlebar region which is close to the middle of thehandlebars. In the case of the known throttle twist grips, there is thedisadvantage that the installation space in the region of the rider'sthumb, which is limited by further switching elements, such as, forexample, light switch, indicator switch, gear shift, etc., is requiredfor the arrangement of the restoring spring.

It is therefore the object of the invention further to develop thehandlebar grip according to the precharacterizing clause of claim 1 insuch a way that it is possible to provide throttle twist grips havingrestoring springs and electric control signals, which throttle twistgrips require substantially the same installation space as knownthrottle twist grips with mechanical actuation.

The object of the invention is achieved by a handlebar grip according tothe features of claim 1. Advantageous configurations of the inventionare stated in the dependent claims.

In relation to this application, the term “outer region of the handlebargrip” designates a region of the handlebar grip which is located on theside remote from the middle of the handlebars in the case of a handlebargrip mounted on a handlebar or which is located on the side remote fromthe middle of the vehicle in the case of a handlebar grip mounted on ahandlebar of a vehicle. The outer region of the handlebar grip can thusalso be referred to as “region remote from the middle of the handlebars”or “region close to the vehicle side”, i.e. a region which is close tothe vehicle side in the case of a handlebar grip mounted on a handlebarof a vehicle.

According to the invention, the handlebar grip has a spring engagementsection for engaging a restoring spring for a throttle twist griparranged on a handlebar tube of a vehicle and intended for actuating anactuator which determines the fuel supply for an internal combustionengine of the vehicle, the spring engagement section being formed in anouter region of the handlebar grip in the longitudinal direction of thehandlebar grip.

According to the invention, there is the advantage that the limitedinstallation space in the region of the handlebar, laterally inside thehandlebar grip, is not required for the restoring spring. Consequently,the housing can be made smaller and in the usual manner. This results inlower development and manufacturing costs.

According to the invention, the handlebar grip can have a sensor holdingsection for holding a sensor for detecting the rotational position ofthe handlebar grip, the spring engagement section being formed in aninner region of the handlebar grip in the longitudinal direction of thehandlebar grip. The spring engagement section and the sensor holdingsection can be formed at opposite end regions of the handlebar grip,relative to the longitudinal direction of the handlebar grip.

According to the invention, the handlebar grip can have a mountingsection for mounting the handlebar grip on the handlebar in such a waythat it is rotatable about the axis of the handlebar in the grip region,the spring engagement section being formed in an inner region of thehandlebar grip in the longitudinal direction of the handlebar grip.Preferably, the spring engagement section and the mounting section canbe formed on opposite sides of the handlebar grip, relative to thelongitudinal direction of the handlebar grip.

According to the invention, the mounting section can be formed outsidethe sensor holding section, relative to the longitudinal direction ofthe handlebar grip.

The invention also relates to a throttle twist grip having a handlebargrip according to the invention.

The throttle twist grip according to the invention furthermore has atleast one restoring spring. It is also possible to provide a pluralityof restoring springs or other restoring means which are arranged atleast partly in the outer region of the throttle twist grip.

According to the invention, the restoring spring can be in the form of atorsion spring. The torsion spring can be in the form of a helicalspring or in the form of a torsion bar.

According to the invention, the throttle twist grip can furthermore havea spring housing.

According to an embodiment of the invention, the spring housing can befixed, preferably by means of a screw and/or bolt connection, to thespring engagement section of the handlebar grip so as to be rotatableabout the longitudinal axis of the handlebar grip.

According to the invention, the spring housing can have an externaldiameter which substantially corresponds to the internal diameter of thehandlebar grip. Thus, the external diameter of the spring housing cansubstantially correspond to the external diameter of the handlebar tubeand is an extension of the handlebar tube on which the handlebar grip isarranged.

According to the invention, the spring housing can have an engagementsection for engagement in a nonrotatable manner in a correspondinglyformed engagement section of a handlebar tube. The engagement section ofthe spring housing can be formed on the inside of the spring housing.Furthermore, the engagement section of the spring housing may have ribsfor holding in corresponding recesses provided on a handlebar tube.

According to a further embodiment of the invention, the throttle twistgrip can furthermore have a handlebar weight, it being possible for thespring housing to be integrated in the handlebar weight. The handlebarweight can be formed in such a way that it can be fixed in anonrotatable manner to a handlebar tube, preferably by means of a screwand/or bolt connection.

According to a further embodiment of the invention, the spring housingcan be integrated in that region of the handlebar tube which is an outerregion relative to the handlebar. The throttle twist grip may also havea handlebar weight. Furthermore, the spring housing can be formed insuch a way that it can be inserted into that region of the handlebartube which is an outer region relative to the handlebar.

According to the invention, the restoring spring can have a handlebargrip engagement section for engaging the handlebar grip and a springhousing engagement section for engaging the spring housing.

According to the invention, the sensor or the sensors can be in the formof an angle sensor, in particular in the form of a contactless and/ornon-contact angle sensor and/or potentiometric angle sensor and/or inthe form of a Hall sensor, in the form of a Hall-effect pick-up, in theform of a Hall controller, in the form of a gyroscopic sensor, in theform of a piezo sensor, in the form of a position sensor, in particularin the form of a magnetostrictive position sensor, in the form of ashaft encoder, in particular in the form of a magnetic incrementalencoder, in the form of a magnetic angle sensor, in particular in theform of a magnetic scale sensor, in the form of a cable extensionsensor, in the form of an inductive sensor, in the form of a capacitivesensor and/or in the form of an optoelectronic angle sensor.

Alternatively or in addition to the sensor (the sensors), at least onepressure sensor and preferably two pressure sensors can be provided formeasuring the pressure exerted by the restoring spring. The pressuresensor or sensors can be formed and arranged for holding an end of therestoring spring.

The invention is described in more detail below with reference to theworking examples shown in the figures.

FIG. 1 shows a sectional view of a handlebar grip according to theinvention in a throttle twist grip according to the invention, accordingto a first embodiment of the invention, along the line I-I of FIG. 4.

FIG. 2 shows an enlarged cut-out of FIG. 1 in the region of the circleII shown as a dash-dot line.

FIG. 3 shows a view of a handlebar tube with the spring housing and thespring of the embodiment according to the invention of FIG. 1 from therear (relative to the riding direction of the vehicle), the other partsof the throttle twist grip not being shown for the sake of clarity.

FIG. 4 shows a sectional view of the embodiment according to theinvention of FIG. 1 along the line IV-IV of FIG. 1.

FIG. 5 shows a view of the embodiment according to the invention of FIG.1 from the side (relative to the vehicle, from the middle of thevehicle), the housing holding the connections and the handlebar gripadditionally being shown.

FIG. 6 shows a view corresponding to FIG. 1, the housing holding theconnections and the handlebar grip additionally being shown.

FIG. 7 shows a view corresponding to FIG. 5, a handlebar tube beingshown instead of the housing holding the connections and the handlebargrip.

FIG. 8 shows a sectional view of the handlebar grip according to theinvention in a throttle twist grip according to the invention, accordingto a second embodiment of the invention, along the line VIII-VIII ofFIG. 11.

FIG. 9 shows a enlarged cut-out of FIG. 8 in the region of the circle IXshown as a dash-dot line.

FIG. 10 shows a view corresponding to FIG. 8, only the handlebar gripand the grip covering being shown.

FIG. 11 shows an external view of the throttle twist grip of FIG. 8.

FIG. 12 shows a view, corresponding to FIG. 7, of the throttle twistgrip of FIG. 8.

FIG. 13 shows a sectional view of a handlebar grip according to theinvention in a throttle twist grip according to the invention, accordingto a third embodiment of the invention, along the line XIII-XIII of FIG.16.

FIG. 14 shows an enlarged cut-out of FIG. 13 in the region of the circleXIV shown as a dash-dot line.

FIG. 15 shows a view corresponding to FIG. 13, only the handlebar gripand the grip covering being shown.

FIG. 16 shows an external view of the throttle twist grip of FIG. 13.

FIG. 17 shows a view, corresponding to FIG. 7, of the throttle twistgrip of FIG. 13.

FIG. 18 shows a sectional view of a throttle twist grip according to theinvention, according to a fourth embodiment of the invention, along theline XVIII-XVIII of FIG. 20.

FIG. 19 shows an external view of the throttle twist grip of FIG. 18.

FIG. 20 shows a view of the embodiment according to the invention ofFIG. 18 from the side (relative to the vehicle, from the middle of thevehicle).

FIG. 21 shows a sectional view of the throttle twist grip according tothe invention of FIG. 18 along the line XXI-XXI of FIG. 19.

FIG. 22 shows a sectional view of the throttle twist grip according tothe invention of FIG. 18 along the line XXII-XXII of FIG. 21.

FIG. 23 shows a view, corresponding to FIG. 21, according to a fifthembodiment of the invention, in which at least one pressure sensor isprovided and which otherwise corresponds substantially to the fourthembodiment of the invention.

The following reference numerals are used in the description of theworking example, corresponding reference numerals being incremented by100 or 200 in the case of the different embodiments:

-   1 Throttle twist grip-   2 Handlebar tube-   10 Handlebar grip-   11 Mounting section-   12 Spring engagement section-   13 Sensor holding section-   14 Grip covering-   20 Restoring spring-   21 Handlebar grip engagement section (for engagement of the spring    in the handlebar grip)-   22 Spring housing engagement section (for engagement of the spring    in the spring housing)-   30 Spring housing (nonrotatable relative to handlebar tube)-   31 Extension-   32 Rib-   33 Screw-   34 Spring engagement section-   40 Housing-   41 Inner edge-   101 Throttle twist grip-   102 Handlebar tube-   110 Handlebar grip-   111 Mounting section-   112 Spring engagement section-   113 Sensor holding section-   114 Grip covering-   120 Restoring spring-   121 Handlebar grip engagement section (for engagement of the spring    in the handlebar grip)-   122 Spring housing engagement section (for engagement of the spring    in the spring housing integrated in the handlebar weight)-   130 Spring housing (nonrotatable relative to the handlebar tube)-   133 Screw-   135 Handlebar weight-   150 Disc (arranged nonrotatably at the end of the handlebar tube)-   151 Spring engagement section-   201 Throttle twist grip-   202 Handlebar tube-   210 Handlebar grip-   211 Mounting section-   212 Spring engagement section-   213 Sensor holding section-   214 Grip covering-   220 Restoring spring-   221 Handlebar grip engagement section (for engagement of the spring    in the handlebar grip)-   222 Spring housing engagement section (for engagement of the spring    in the spring housing)-   230 Spring housing (nonrotatable relative to the handlebar tube)-   233 Screw-   234 Spring engagement section-   235 Handlebar weight-   301 Throttle twist grip-   302 Handlebar tube-   310 Handlebar grip-   312 Spring engagement section-   314 Grip covering-   320 Restoring spring-   321 Handlebar grip engagement section (for engagement of the spring    in the handlebar grip)-   322 Spring housing engagement section (for engagement of the spring    in the spring housing)-   333 Screw-   334 Spring engagement section-   335 Handlebar weight-   401 Throttle twist grip-   402 Handlebar tube-   410 Handlebar grip-   414 Grip covering-   421 Handlebar grip engagement section (for engagement of the    restoring spring in the handlebar grip)-   422 Spring housing engagement section (for engagement of the    restoring spring in the spring housing)-   433 Screw-   434 Spring engagement section-   441 Pressure sensor-   442 Pressure sensor

FIGS. 1 to 7 show a first embodiment of the invention.

The throttle twist grip according to the invention is designated as awhole in FIGS. 1 to 7 by the reference numeral 1 and is suitable forbeing arranged on a handlebar tube 2 (cf. FIGS. 3 and 7). For example,the throttle twist grip 1 can be mounted rotatably on the handlebar tube2 by means of the housing shown in FIGS. 5 and 6.

The handlebar grip 10 according to the invention is not shown separatelybut only in association with the throttle twist grip according to theinvention.

The handlebar grip 10 has a mounting section 11 (FIG. 1) which is in theform of a groove which is engaged by an inner edge 41 of the housing 40,as shown, for example, in FIG. 6. The housing 40 can be fastenednonrotatably in a known manner on the handlebar tube 2. Consequently,the handlebar grip 10 can be arranged on the handlebar tube so as to berotatable and nondisplaceable in the axial direction. Thus, thehandlebar grip can be turned about the handlebar tube in a usual mannerfor opening the throttle.

A grip covering 14 is arranged on the handlebar grip 10. A heatingdevice, for example in the form of a resistance foil or of a heatingwire, can be provided in a known manner between grip covering 14 andhandlebar grip.

The handlebar grip has, on its side which is on the inside relative tothe vehicle, a sensor holding section 13 in which a sensor can be heldin a known manner, which sensor outputs an electric signal which is ameasure of the rotational position of the throttle twist grip relativeto the handlebar tube and can be transmitted to a corresponding controldevice in a known manner for actuating an actuator for opening thethrottle. Regarding the options, reference is made explicitly to thedisclosure of the abovementioned DE 100 27 193 A1, the disclosurecontent of which is to be incorporated here by reference in its entiretyand in particular in this respect.

The throttle twist grip 1 according to the invention is also providedfor use without mechanical actuation of the actuator by means of a cablepull. Usually, the cable pull is provided with a pressure spring whichexerts a restoring force on the throttle twist grip in order to returnit to the zero position when the throttle twist grip is released by therider.

This function is performed by the restoring spring 20. The restoringspring is arranged in the throttle twist grip so that, in contrast tothe prior art, the limited installation space in the region of thehousing 40 is not required. This has the advantage that the installationspace is available for the other components and a visually pleasingsolution is achievable.

The handlebar grip 10 is closed in its region which is on the outsiderelative to the vehicle and has there a spring engagement section 12which can be engaged by the restoring spring 20.

The restoring spring 20 is a torsion spring which, in this workingexample, is in the form of a helical spring or spiral spring. In allembodiments shown, other springs are of course also conceivable, suchas, for example, torsion bars or the like. It is also possible toprovide a plurality of spring elements. The variant shown and comprisinga torsion spring by means of which a simple design is achievable ispreferred.

The restoring spring 20 is held in a spring housing 30 and has ahandlebar grip engagement section 21 for engagement of the spring in thehandlebar grip and a spring housing engagement section 22 for engagementof the spring in a spring engagement section 34 of the spring housing 30(FIG. 2).

The spring housing 30 is formed in such a way that it can be mountednonrotatably relative to the handlebar tube. For this purpose, it has anextension 31 on which ribs 32 are arranged, which ribs engagecorresponding recesses which are provided on the handlebar tube 2. Thespring housing 30 is rotatably fixed by means of a screw 33 on thespring engagement section 12 of the handlebar grip 10.

The throttle twist grip 1 can be provided as a preassembled unit with orwithout housing 40. The restoring spring 20 can be preassembled in thespring housing 30. For this purpose, the restoring spring 20 can beinserted into the spring housing 30 in such a way that the springhousing engagement section 22 engages a corresponding spring engagementsection of the spring housing 30. The spring housing 30 can then bepreassembled with the restoring spring in the handlebar grip 10. Forthis purpose, the handlebar grip engagement section 21 of the restoringspring 20 can be introduced into a corresponding spring engagementsection 12 of the handlebar grip 10, and the spring housing 30 can berotatably fixed on the handlebar grip 10 by means of the screw 33.

If the throttle twist grip 1 is subsequently mounted on the handlebartube 2, it should be ensured that the rotation-prevention means (e.g.the ribs 32) mounted on the spring housing are positioned correctlyrelative to the corresponding recesses (or extensions, etc. in the caseof other conceivable rotation-prevention means). The restoring spring 20is then pretensioned by turning the throttle twist grip 1 to a specificdesired position in which the throttle twist grip 1 is secured byscrewing the housing 40 on the handlebar tube 2. The handlebar grip 10of the throttle twist grip 1 can then be turned in a direction from itszero position (idling position) and, owing to the restoring force of therestoring spring, returns to this position, for example on releasing thethrottle twist grip.

FIGS. 8 to 12 show a second embodiment of the invention. In comparisonwith the preceding embodiment, identical or corresponding parts aredesignated by the same reference numerals incremented by 100. Below, thedifferences in the embodiment shown in FIGS. 8 to 12 compared with thefirst embodiment shown in FIGS. 1 to 7 and described above aredescribed. Otherwise, reference is made to the above description of thefirst embodiment.

In the case of the embodiment shown in FIGS. 8 to 12, the spring housing130 is integrated in a handlebar weight 135 which can be fixed to thehandlebar tube by means of a screw 133.

The means for preventing rotation of the restoring spring 120 relativeto the handlebar tube 102 is realized by a disc 150 which is mounted atthe end of the handlebar tube 102 in a nonrotatable manner and which hasa spring engagement section 151.

The restoring spring 120 is arranged outside the handlebar grip 110(i.e. laterally outside relative to the vehicle), in the spring housing130 integrated in the handlebar weight 135. The restoring spring 120 hasa handlebar grip engagement section 121 for engagement of the restoringspring 120 in the handlebar grip 110, and a spring housing engagementsection 122 for engagement of the restoring spring in the springengagement section 151 integrated in the disc 150.

For mounting, the handlebar grip engagement section 121 of the restoringspring 120 is arranged in the corresponding recess of the handlebar grip110, and the spring housing engagement section 122 of the restoringspring 120 is arranged in the corresponding spring engagement section ofthe handlebar weight 135 (spring housing 130).

The restoring spring 120 is then pretensioned by turning the throttletwist valve 101 to a specific desired position in which the throttletwist grip 101 is secured on the handlebar tube 102 by fixing thehousing, which is not shown (cf. first working example, housing 40).

FIGS. 13 to 17 show a third embodiment of the invention. In comparisonwith the preceding embodiments, identical or corresponding parts aredesignated by the same reference numerals incremented by 100 or 200.Below, the differences in the embodiment shown in FIGS. 13 to 17compared with the first two embodiments shown in FIGS. 1 to 7 and 8 to12, respectively, and described above are described. Otherwise,reference is made to the above description of the first two embodiments.

In the case of the embodiment shown in FIGS. 13 to 17, the springhousing 230 is integrated in the handlebar tube 202. In other words, therestoring spring 220 is arranged in the handlebar tube 202 and thereengages, for example, a driver which is positioned firmly on thehandlebar tube 202.

The restoring spring 220 is arranged inside the handlebar grip in thehandlebar tube 202, which is in the form of spring housing 230 there.The restoring spring 220 has a handlebar grip engagement section 221 forengagement of the restoring spring 220 in the handlebar grip 210, and ahandlebar tube engagement section 222 for engagement of the restoringspring 220 in the handlebar tube 202.

For mounting, the handlebar grip engagement section 221 of the restoringspring 220 is arranged in the corresponding recess of the handlebar grip210, and the handlebar tube engagement section 222 of the restoringspring 220 is arranged in a corresponding spring engagement section ofthe handlebar tube 202 (spring housing 230).

The restoring spring 220 is then pretensioned by turning the throttletwist grip 201 to a specific desired position in which the throttletwist grip 201 is secured on the handlebar tube 202 by fixing thehousing, which is not shown (cf. first working example, housing 40).

FIGS. 18 to 22 show a fourth embodiment of the invention. In comparisonwith the preceding embodiments, identical or corresponding parts aredesignated by the same reference numerals incremented by 100, 200 and300, respectively. Below, the differences in the embodiment shown inFIGS. 18 to 22 in comparison with the first three embodiments shown inFIGS. 1 to 7, 8 to 12 and 13 to 17, respectively, and described aboveare described. Otherwise, reference is made to the above description ofthe preceding three embodiments.

That embodiment of the invention which is shown in FIGS. 18 to 22correspond substantially to that embodiment of the invention which isshown in FIGS. 13 to 17. The drawings of the embodiment shown in FIGS.18 to 22 show components which are mounted on the handlebar tube andwhich are not shown in the case of the embodiment shown in FIGS. 13 to17, for the sake of clarity. Furthermore, the handlebar tube 302 isalways shown in the case of the embodiment shown in FIGS. 18 to 22.Reference is therefore made in particular to the description of theworking examples shown in FIGS. 13 to 17, identical components beingdesignated by a reference numeral incremented by 100 not beingexplicitly designated again.

In contrast to the working example shown in FIGS. 13 to 17, therestoring spring 320 does not project into the handlebar weight 335 inthe case of the working example shown in FIGS. 18 to 22. In contrast tothe handlebar weight 235, the handlebar weight 335 has no recess intowhich the restoring spring 220 projects. The handlebar tube 302 likewiseextends in the direction of the handlebar weight 335 substantially justas far as the handlebar grip 310. In other words, the spring space isformed between the handlebar tube 302 and the handlebar grip 310 and isclosed at the end by the handlebar weight 335. In the embodiment ofFIGS. 13 to 17, the spring space is likewise formed between thehandlebar tube 202 and the handlebar grip 210. However, it extends alittle further into the handlebar weight 235, the handlebar tube 202likewise extending into the handlebar weight. The handlebar weight 235terminates the spring space at the end and forms a lateral boundary ofthe spring space in the lateral region adjacent to the end face.

In the embodiment of FIGS. 13 to 17, the spring engagement section 212is formed in a region which is surrounded by the handlebar weight,whereas in the embodiment of FIGS. 18 to 22 the spring engagementsection 312 is formed in a region which is surrounded by the gripcovering 314.

That embodiment of the invention which is shown in FIG. 23 correspondssubstantially to that embodiment of the invention which is shown inFIGS. 18 to 22, the description and figures of which are referred to,the views of FIGS. 18 to 20 and 22 being identical, and the views ofFIGS. 21 and 23 corresponding apart from the differences mentionedbelow, the reference numerals of the corresponding components beingincremented by 100 in the case of the embodiment of FIG. 23.

The embodiment shown in FIG. 23 has pressure sensors 441, 442 whichengage the ends (throttle grip engagement section 421 and spring housingengagement section 422) of the restoring spring and determine thepressure exerted by the ends of the restoring spring, which pressure isa measure of the angle of rotation of the twist grip. Preferably,pressure sensors 441, 442 are provided at both ends of the restoringspring. A higher accuracy is achieved as a result of the two measuredvalues. It is of course also possible to provide only one pressuresensor 441 or 442, so that only the force exerted at one end of therestoring spring is determined.

In that embodiment of the invention which is shown in FIG. 23, thepressure sensors 441 and 442 can be provided alternatively or inaddition to the other sensors.

1. Handlebar grip for a throttle twist grip arranged on a handlebar tubeof a vehicle and intended for actuating an actuator which determines thefuel supply for an internal combustion engine of the vehicle, thehandlebar grip having a spring engagement section for engagement of arestoring spring, wherein the spring engagement section is formed in anouter region of the handlebar grip in a longitudinal direction of thehandlebar grip.
 2. Handlebar grip according to claim 1, furthermorehaving a sensor holding section for holding a sensor for detecting therotational position of the handlebar grip, the spring engagement sectionbeing formed in an inner region of the handlebar grip in thelongitudinal direction of the handlebar grip.
 3. Handlebar gripaccording to claim 2, wherein the spring engagement section and thesensor holding section are formed in opposite end regions of thehandlebar grip, relative to the longitudinal direction of the handlebargrip.
 4. Handlebar grip according to claim 1, furthermore having amounting section for mounting the handlebar grip on the handlebar so asto be rotatable about the axis of the handlebar in the grip region, thespring engagement section being formed in an inner region of thehandlebar grip in the longitudinal direction of the handlebar grip. 5.Handlebar grip according to claim 4, wherein the spring engagementsection and the mounting section are formed on opposite sides of thehandlebar grip, relative to the longitudinal direction of the handlebargrip.
 6. Handlebar grip according to claim 4, furthermore having asensor holding section for holding a sensor for detecting the rotationalposition of the handlebar grip, wherein the mounting section is formedoutside the sensor holding section, relative to the longitudinaldirection of the handlebar grip.
 7. Throttle twist grip having ahandlebar grip according to claim
 1. 8. Throttle twist grip according toclaim 7, furthermore having at least one restoring spring.
 9. Throttletwist grip according to claim 8, wherein the restoring spring is in theform of a torsion spring.
 10. Throttle twist grip according to claim 9,wherein the torsion spring is in the form of a helical spring. 11.Throttle twist grip according to claim 9, wherein the torsion spring isin the form of a torsion bar.
 12. Throttle twist grip according to claim7, furthermore having a spring housing.
 13. Throttle twist gripaccording to claim 12, wherein the spring housing is fixed on the springengagement section of the handlebar grip to be rotatable about thelongitudinal axis of the throttle grip, by a screw and/or boltconnection.
 14. Throttle twist grip according to claim 12, wherein thespring housing has an external diameter which substantially correspondsto the internal diameter of the handlebar grip.
 15. Throttle twist gripaccording to claim 12, wherein the spring housing has an engagementsection for engaging a correspondingly formed engagement section of ahandlebar tube in a nonrotatable manner.
 16. Throttle twist gripaccording to claim 15, wherein the engagement section of the springhousing is formed on an inside of the spring housing.
 17. Throttle twistgrip according to claim 15, wherein the engagement section of the springhousing has ribs for accommodation in corresponding recesses provided onthe handlebar tube.
 18. Throttle twist grip according to claim 12,furthermore having a handlebar weight, the spring housing beingintegrated in the handlebar weight.
 19. Throttle twist grip according toclaim 18, wherein the handlebar weight is formed to be fixed in anonrotatable manner on a handlebar tube by a screw and/or boltconnection.
 20. Throttle twist grip according to claim 12, wherein thespring housing is integrated in a region of the handlebar tube which isan outer region relative to the handlebar.
 21. Throttle twist gripaccording to claim 12, wherein the spring housing is formed to beinserted into a region of a handlebar tube which is an outer regionrelative to the handlebar.
 22. Throttle twist grip according to claim12, wherein the restoring spring has a handlebar grip engagement sectionfor engagement in the handlebar grip and a spring housing engagementsection for engagement in the spring housing.
 23. Throttle twist gripaccording to claim 12, wherein the sensor is in the form of an anglesensor in the form of a contactless and/or non-contact angle sensorand/or potentiometric angle sensor and/or in the form of a Hall sensor,in the form of a Hall-effect pick-up, in the form of a Hall controller,in the form of a gyroscopic sensor, in the form of a piezo sensor, inthe form of a position sensor in the form of a magnetostrictive positionsensor, in the form of a shaft encoder in the form of a magneticincremental encoder, in the form of a magnetic angle sensor in the formof a magnetic scale sensor, in the form of a cable extension sensor, inthe form of an inductive sensor, in the form of a capacitive sensorand/or in the form of an optoelectronic angle sensor.
 24. Throttle twistgrip according to claim 12, wherein at least one pressure sensor isprovided for measuring the pressure exerted by the restoring spring. 25.Throttle twist grip according to claim 24, wherein the at least onepressure sensor is formed and arranged for receiving an end of therestoring spring.